FREE · PRIVATE · INSTANT

Subway Tile Calculator

Subway Tile Calculator estimates rectangular subway tile pieces and boxes for backsplashes, shower walls, and wainscot. Enter job dimensions in U.S. customary units, adjust supplier assumptions, and get purchase-ready quantities instantly.

Loading calculator…

HOW IT WORKS

Formula and assumptions

Compare tile face area with whole-row/whole-column layout, apply waste, and estimate grout from joint geometry and package weight.

Full tile face dimensions are used.
Boxes contain an equal number of pieces.

FIELD CHECK

Before you order

Running bond, one-third offset, vertical, herringbone, niches, and centered layouts require different cut allowances.

Worked example

Example: with surface length 16 ft, surface width / height 3 ft, tile length 6 in, tile width 3 in, the subway tile calculator returns 11 boxes for boxes to buy. The supporting check is individual tiles: 442 tiles. Replace the prefilled measurements and supplier assumptions with the project values before ordering.

PROJECT GUIDE

Using this calculator well

WHEN TO USE IT

Best use of this calculator

Use the result as a planning estimate, then verify field measurements and product-specific data before ordering or building.

INPUTS EXPLAINED

What each input means

Surface length: Enter the measured value and choose the matching unit (ft, in, yd, m, cm).
Surface width / height: Enter the measured value and choose the matching unit (ft, in, yd, m, cm).
Tile length: Enter the measured value and choose the matching unit (in, ft, cm, mm).
Tile width: Enter the measured value and choose the matching unit (in, ft, cm, mm).
Pieces per box: Enter the project value used by the calculation.
Grout joint: Enter the measured value and choose the matching unit (in, ft, cm, mm).
Filled joint depth: Enter the measured value and choose the matching unit (in, ft, cm, mm).
Waste allowance: Enter the project value in %.
Price per box: Enter the project value in $.

COMMON MISTAKES

Checks that prevent bad estimates

Mixing units or entering a measurement in a different unit than the selected field unit.
Using a planning default when the exact manufacturer or supplier specification is available.
Rounding intermediate measurements too early instead of rounding the final purchase quantity.
Ignoring waste, compaction, cuts, laps, settlement, or full-package rounding where the project requires them.

SOURCES & REVIEW

How this estimate is supported

The implemented formula, assumptions, and worked example on this page are the calculator-specific reference. BuildYard's broader rules are documented in the Calculation Methodology and Sources & References.

For material density, coverage, yield, dimensions, package quantity, price, and other product-specific values, the current manufacturer or supplier specification should override a planning default.

Last reviewed: September 15, 2026, as part of the site-wide calculator workflow validation pass. See the BuildYard Changelog.

LEARN THE METHOD

Guides related to this calculator

All guides

Flooring

Flooring Waste, Carton Coverage, and Purchase Rounding

Learn how net floor area, pattern waste, carton coverage, whole-package rounding, room layout, and product specifications affect flooring quantities.

Read guide →

COMMON QUESTIONS

Subway Tile Calculator FAQ

What does the Subway Tile Calculator calculate?

It converts the measurements for backsplashes, shower walls, and wainscot into the buying units normally used for rectangular subway tile pieces and boxes, with the relevant waste, package, weight, or cost outputs shown on the result card.

How accurate is this subway tile calculator?

The geometry is calculated from the values you enter. Final ordering accuracy still depends on field measurements, supplier density or coverage, product dimensions, compaction, cuts, and the selected allowance.

What should I verify for backsplashes, shower walls, and wainscot?

Running bond, one-third offset, vertical, herringbone, niches, and centered layouts require different cut allowances. Confirm the selected product, field conditions, and purchasing increments before placing the order.

Should I round the result up?

Yes for indivisible buying units such as bags, sheets, bundles, pallets, boxes, bars, and truck loads. The calculator rounds those purchase quantities up automatically.

KEEP ESTIMATING

Related tile calculators

All Tile tools

Tile